Question

At what time the sum Rs. 5000 will be doubled at the interest
of 10% per annum?
(Ans: 10 years)​

Answer 1

Step-by-step explanation:

It can be done like this;

2P = P(1+RT/100)

normal equation of simple interest amount

since amount is doubled to principal we take A= 2P.

hence;

2= 1 + 0.1T

1 / 0.1 = T

Therefore its 10 years.